Observation-platform.



N. 685,620. .Patented 0st. 29, |901.,

G. LIMBACH. OBSEHVATIUN PLATFORM.

(Application md June e, 1901.

(No Model.)y 2 Sheets-Sheet I.

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UNITED STATES PATENT @Fries GEORGE LIMBACH, OF NEW YORK, N. Y.

OBSERVATION-PLATFORM.

SPECIFICATION forming part of Letters Patent No. 685,620, dated October 29, 1901.

Application tiled June 6, 1901. Serial No. 63,406. (No model.)

To @ZZ whom t may concern: l

Be it known that I, GEORGE LIMBACH, a citizen of the United States, residing in New York, borough of Bronx, in the State of New York, have invented certain new and useful Improvements in Observation-Platforms, of which the following is a specification.

This invention is intended to supply a socalled observation-platform that `can be used either for pleasure purposes along the Sea-coast and in the mountains for the purpose of easily raising persons to a height for enjoying vthe view or which can be used for scientific purposes or for observation purposes in war or otherwise or for ordinary elevators in warehouses, &c.

The invention consists in the combination, witha stationary screw-threaded pillar, of an observation-platform provided with an interiorly-threaded nut meshing with said pillar, a U-shaped frame on each pillar, the radial arms of which are swiveledy to said pillar, said platform being connected with the intermediate portion of said frame, and a powertransmitting mechanism connected with said frame for rotating it around the pillar.

In the accompanying drawings, Figure 1 represents a perspective view of my improved observation-platform. Fig. 2'is a detail of the driving mechanism of the same. Fig. 3 is a perspective view of a modified construction, showing two platforms which may be raised and lowered alternately and driven simultaneously by the same power-transmitting mechanism; and Fig. 4 isla detail vertical central section through the platform.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents an uprightscrew-threaded pillar which is mounted on a base-piece A', suitably anchored in the ground in any approved manner. On the threaded pillar A is arranged a platform B, of circular or other shape, which is provided with a suitable railing b, interior seats b', and a hood b2, supported above the seats, so as to protect the occupants against sun and rain. y

Below the platform is arranged a curtain B2, that serves to cover the driving mechanism when the platform is in its lowermost position.

At the center of the platform Bis arranged an interiorly-threaded Sleeve C, Fig. 4, Which while the other descends.

serves as a nut by which the platform is adapted to be moved upwardly or downwardly. To the circumference of the platform is fixed an eye D, in which is guided the vertical portion of a U-shaped upright frame E, that is swiveled tothe upper and lower ends of the threaded pillar by the bent-over radial arms e thereof, having eyes e', receiving the pillar, as shown in Figs. 1 and 3. The eye or sleeve D, attached to the platform, moves along the upright portion of the rotating frame E as the platform ascends or descends on the stationary pillar, rotary motion being imparted to the frame E by any suitable motion-transmitting mechanism, prefer ably by means of a bevel-wheel f, that is supported loosely on a fixed collar F on the lower end of the pillar A and to the hub of which the lower eye of the frame E is rigidly attached. A pinion f' meshes with the bevelwheel f, said 'pinion receiving motion in one o r the opposite direction from a shaft f2, to which motion is imparted in one or the opposite direction by a belt and pulley from a suitable motor. (Not shown in the drawings.)

In place of'onc observation-platform two platforms may be arranged alongside of each other, as shown in Fig. 3, which maybe driven through their gears f5 by pinion f3 and gearwheel f4 from the same power-transmitting mechanism, so that one platform ascends platform is in all cases, however, readily accomplished by the rotating frame E.

The driving of the When the platform arrives at the upper end of the pillar A, a signal is given by electricity or otherwise to the engineer, so that the engine may be reversed at the proper time, and thereby the direction of motion of the platform changed. Any suitable mechan ismsuch as electrical, pneumatic, or mechanical-may be used by which thesignal is given to the engineer to reverse the engine at the proper time, so as to produce the ascending and descending of the platform.

Having thus describedV my invention, I claim as new and desire to secure by Letters Patent l. The combination,with a stationary screwn threaded pillar, of an observation-platform provided with an interiorly-threadedv nut meshing with said pillar, a U-shaped frame,

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the radial arms of which are swiveled to said pillar, said platform being connected With the intermediate portion of said frame, and a power transmitting mechanism connected with said frame for rotating it around the pillar, substantially as set forth.

2. The Combination, with two stationary screw-threaded pillars, of an observation-platform on each pillar, provided With an interiorly-threaded nnt meshing therewith; a U- shaped frame on each pillar, the radial arms of which are swiveled to said pillar, said platform being connected with the intermediate portion of said frame, and means for simultaneously rotating said frames around their respective pillars, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my naine in presence of two subscribing Witnesses.

GEORGE LIMBACI'L Witnesses:

PAUL GOEPEL, GEO. L. WHEELOCK. 

